This is an injection-plastic aircraft model kit.
Don't let that scare you off, however. The detail, particularly on the main exterior surfaces, is surprisingly good, with nicely recessed panel lines and rivets throughout. The cockpit and engine, however, are a bit weak, but otherwise, if you're looking for a nice big kit that will build up easily into a pretty good-looking Mustang, you've just found it. Brand-new decals by Cartograf from Italy. Includes markings for two different aircraft.